refactor: consume @citation-evidence/work for review mode (CWORK-WP-0001 cutover)

Cut review mode over to the extracted citation-work package instead of a local
src/work/ implementation.

- Add @citation-evidence/work as a link: dependency
- Repoint the @work alias (tsconfig + vite) to ../citation-work/src/work and
  allow vite fs access to the sibling
- Remove the local src/work/ implementation (now owned by citation-work)

Typecheck, lint, and the full test suite (51 tests) pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tsconfig.json

@@ -28,7 +28,7 @@
       "@shared/*": ["../citation-engine/src/shared/*"],
       "@engine/*": ["../citation-engine/src/engine/*"],
       "@source/*": ["src/source/*"],
-      "@work/*":   ["src/work/*"],
+      "@work/*":   ["../citation-work/src/work/*"],
       "@binder/*": ["../evidence-binder/src/*"],
       "@app/*":    ["src/app/*"]
     }